CN110896469A - Resolution testing method for three-shot photography and application thereof - Google Patents
Resolution testing method for three-shot photography and application thereof Download PDFInfo
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Abstract
The invention provides a resolution testing method for three-shot photography and application thereof, wherein the resolution testing method comprises the following steps: (A) a main camera module, a wide camera module and a tele camera module shoot the same target, (B) acquiring three images, wherein one of the images corresponds to the main camera module, one of the images corresponds to the wide camera module and the other image corresponds to the tele camera module, (C) processing the images based on the type of the camera module from which the images originate and obtaining a test area, (D) processing the test area to obtain an EFS curve and obtaining an LSF curve from the EFS curve and (E) processing the LSF curve to obtain an SFR value.
Description
Technical Field
The invention relates to the field of resolution test of a camera module, in particular to a resolution test method applied to three-camera shooting and application thereof.
Background
The market of the smart phone is huge, the pursuit of the consumers for the shooting quality enables manufacturers to develop smart phones with three cameras, and the smart phones of the type provide higher-quality experience compared with single-camera phones or double-camera phones in the aspects of zooming, high resolution, depth of field blurring and the like. The triple-shooting mobile phone is provided with a wide-angle camera shooting module, a main camera shooting module and a long-focus camera shooting module, wherein the field angle of the main camera shooting module is smaller than that of the wide-angle camera shooting module and larger than that of the long-focus camera shooting module.
An important index for determining the quality of a mobile phone with three cameras is the resolution, also called resolution and discrimination, which is actually the ability of the camera module to reproduce the details of the object to be photographed, i.e. the definition. The higher the resolution, the clearer the image observed. Currently, common detection methods for a camera module include MTF (modulation transfer function), SFR (spatial frequency response), and CTF (contrast transfer function).
The sfr (spatial frequency response) is mainly used to measure the effect of line increase with spatial frequency on a single image.
The wide-angle camera module, the main camera module with the long burnt camera module need be separately to respectively in process of production the wide-angle camera module, the main camera module with the resolution power of long burnt camera module carries out the SFR test, is difficult to satisfy the demand that three camera module of cell-phone produce the line multistation and use simultaneously, is unfavorable for the manufacturing factory to use on a large scale on the production line.
Disclosure of Invention
An object of the present invention is to provide a method for testing resolution and applications thereof, wherein the method for testing resolution can simultaneously test resolution of three camera modules of an electronic device.
Another objective of the present invention is to provide a method for testing resolution and applications thereof, which can realize multi-station simultaneous testing of three camera modules by designing a novel target.
The invention also aims to provide a method for testing the resolving power and application thereof, which adopt an image self-adaptive segmentation preprocessing technology and meet the requirement that different camera modules simultaneously test the stability of the SFR algorithm.
The invention also aims to provide a method for testing the resolving power and application thereof, which adopts an image processing technology of self-adaptively searching the nearest edges and provides the visual field precision of automatically positioning each test area by the three camera modules.
Another objective of the present invention is to provide a method for testing resolution and applications thereof, which can analyze images of the camera modules with different field angles to realize simultaneous testing at multiple stations and with high precision.
Another object of the present invention is to provide a method for testing resolution and applications thereof, wherein the method is suitable for mass production in a production line.
Another objective of the present invention is to provide a resolution test method and applications thereof, wherein the resolution test method is simple to operate.
According to an aspect of the present invention, there is provided a resolution testing method for three shots, wherein the resolution testing method comprises the steps of:
the camera system comprises at least one main camera module, at least one wide-angle camera module and at least one long-focus camera module, wherein the at least one wide-angle camera module and the at least one long-focus camera module shoot the same target to simultaneously test the main camera module, the wide-angle camera module and the SFR value of the long-focus camera module, the target is provided with a plurality of first large color blocks and second large color blocks which are arranged alternately, the first large color blocks are filled with second small color blocks, the second large color blocks are filled with the first small color blocks, a field angle of the main camera module is smaller than a field angle of the wide-angle camera module, and the field angle of the main camera module is larger than a field angle of the long-focus camera module.
According to some embodiments of the invention, the method for testing resolution further comprises the steps of:
(a) importing at least one image;
(b) reducing the size of the image and extracting a Y component;
(c) processing the image based on the type of the camera module of the image source to automatically find a nearest test area;
(d) determining a horizontal side and a vertical side according to the principle that the deviation of the field of view is small, and extracting the test region according to the size of the ROI;
(e) processing the test area to obtain an EFS curve and obtaining an LSF curve according to the EFS curve; and
(f) processing the LSF curve to obtain an SFR value.
According to some embodiments of the invention, the step (c) of the resolution testing method further comprises the steps of:
adaptively segmenting a binary image, and filling the second small color blocks of the first large color blocks in the image from the main camera module until the second small color blocks are consistent with the first large color blocks; and
and automatically searching the nearest test area according to a given coordinate point and the first small color block serving as a Mark point.
According to some embodiments of the invention, the edge position is found in four directions, up, down, left and right, with the Mark point center as a starting point.
According to some embodiments of the invention, the step (c) of the resolution test method further comprises the steps of:
adaptively dividing a binary image, and when the image comes from the wide-angle camera module, filling the second small color blocks of the first large color blocks to be consistent with the first large color blocks and filling the first small color blocks of the second large color blocks to be consistent with the second large color blocks; and
and automatically searching the nearest test area according to a given coordinate point and the first small color block serving as a Mark point.
According to some embodiments of the invention, the edge position is found in four directions, up, down, left and right, with the Mark point center as a starting point.
According to some embodiments of the invention, the step (c) further comprises:
adaptively segmenting a binary image; and
and when the image comes from the tele camera module, automatically searching the nearest test area according to the first small color block and the second small color block which are respectively used as Mark points and a given coordinate.
According to some embodiments of the present invention, given that the distance from the coordinate to the Mark point is greater than half of the diagonal angle of the second small color block, the edge position of the second small color block or the edge position of the first small color block is found in four directions, i.e., up, down, left, and right, with the center of the Mark point as a starting point.
According to some embodiments of the present invention, in the method, when the distance from the given coordinate to the Mark point is less than or equal to half of the writing angle of the second small color block, the edge position of the first large color block where the second small color block and the second small color block are located or the edge position of the second large color block where the first small color block and the first small color block are located is found in four directions, i.e., up, down, left, right, and from the center of the Mark point.
According to some embodiments of the invention, the first large color block and the first small color block are both white, and the second large color block and the second small color block are both black.
According to some embodiments of the invention, the first small color blocks and the second small color blocks are squares.
According to another aspect of the present invention, there is provided a resolution testing apparatus to which the resolution testing method according to the above is applied.
According to another aspect of the present invention, there is provided a target for use in a resolution test, wherein the target comprises a plurality of first large color blocks and second large color blocks, wherein the first large color blocks are filled with the second small color blocks, and the second large color blocks are filled with the first small color blocks.
According to some embodiments of the present invention, the first large color block and the second large color block are the same in shape and size.
According to some embodiments of the invention, the first large color block and the first small color block are both white, and the second large color block and the second small color block are both black.
According to another aspect of the present invention, there is provided a resolving power testing apparatus, including:
the target board;
a light source unit;
the system comprises a base station, a camera module and a camera module, wherein the base station is used for supporting a main camera module, a wide-angle camera module and a long-focus camera module; and
an image capture unit communicatively coupled to the main camera module, the wide camera module, and the tele camera module to obtain a corresponding image of the target obtained by the main camera module, the wide camera module, and the tele camera module for subsequent calculation of SFR values.
Drawings
FIG. 1 is a schematic diagram of a target according to a preferred embodiment of the present invention.
Fig. 2 is a schematic diagram of a resolution testing apparatus according to a preferred embodiment of the invention.
Fig. 3A, 3B and 3C are schematic views illustrating respective imaging diagrams of a target applied to a main camera module, a wide camera module and a telephoto camera module according to a preferred embodiment of the invention.
Fig. 4A, 4B and 4C are schematic processing diagrams of a method for testing resolution applied to a main camera module, a wide camera module and a telephoto camera module according to a preferred embodiment of the invention.
Fig. 5 is a flowchart illustrating a method for testing resolution according to a preferred embodiment of the invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
Referring to fig. 1, a preferred embodiment of a target 10 applied to a method for testing resolution according to the present invention is shown.
The target 10 may be a transmissive target 10 or a reflective target 10. The target 10 has a test pattern for testing resolution.
Specifically, the target 10 is composed of a plurality of first large color blocks having a slope of a color difference and a plurality of second large color blocks having a slope, wherein the second large color blocks are surrounded around each of the first large color blocks, and the first large color blocks are surrounded around each of the second large color blocks. In each oblique transverse direction or longitudinal direction, the first large color blocks and the second large color blocks alternately appear.
Further, each of the first large color blocks is filled with a second small color block, each of the second large color blocks is filled with a first small color block, wherein the second small color block and the second large color block have the same color, and the first large color block and the first small color block have the same color.
The second small color blocks and the first large color blocks are positioned in the same inclined direction, and the first small color blocks and the second large color blocks are positioned in the same inclined direction. Preferably, the second small color block is located at a middle position of the first large color block, and the first small color block is located at a middle position of the second large color block. And the second large color blocks around the first large color block where each second small color block is positioned are filled with the first small color blocks. And the first large color blocks around the second large color block where each first small color block is positioned are filled with one second small color block.
The first small color blocks and the second small color blocks are arranged at intervals in the same oblique transverse direction or longitudinal direction.
The first small color block and the second small color block can be used for Mark point positioning.
In this example, the first large color block is implemented as a black square, the second large color block is implemented as a white square, the first small color block is implemented as a small black block, and the second small color block is implemented as a small white block.
It can be understood that the shapes of the first small color block and the second small color block for Mark point positioning are not limited to a square block, and may also be in the shapes of a triangle, a diamond, a polygon, and the like.
Further, the target 10 is used for the resolution test of the three camera modules of the electronic device, and is three the camera modules are, a main camera module a, a wide-angle camera module B and a telephoto camera module C, wherein the field angle of the main camera module a is greater than that of the telephoto camera module C, and the field angle of the wide-angle camera module B is greater than that of the main camera module a.
Considering the difference of the fields of view between the main camera module A, the wide-angle camera module B and the tele camera module C, the first small color block and the second large color block where the first small color block is located, the second small color block and the first large color block where the second small color block is located occupy no more than 0.1 field of view between two and two.
That is to say, the large white square where the small black block and the small black block are located, and the large black square where the small white block and the small white block are located occupy no more than 0.1 field of view in pairs.
The first large color block of each inclination is the same as the second large color block of each inclination, and the second small color block of each inclination is the same as the first small color block of each inclination. The whole target 10 is composed of the first large color block and the second large color block which are the same in size, and the second small color block and the first small color block which are the same in size, so that no matter where a given test coordinate point is located on the target 10, a test area nearest to a specified point can be found for resolution testing.
Referring to fig. 2, according to an aspect of the present invention, the present invention provides a testing apparatus 1 to which the resolution testing method is applied.
Test equipment 1 can be used for the simultaneous test three the module of making a video recording, main module A of making a video recording, wide angle module B of making a video recording and long burnt module C of making a video recording.
Specifically, the testing apparatus 1 includes the target 10, a light source unit 20, a supporting unit 30 and an image capturing unit 40, wherein the target 10 is a full-field SFR target 10 to meet the requirement of multi-station simultaneous testing in a production line. The light source unit 20 provides light rays and the light rays are radiated to the target 10, the supporting unit 30 is used for supporting three camera modules to be tested, the camera modules collect image information from the target 10 and transmit the collected image information to the image collecting unit 40 for subsequent processing.
The target 10 is a reflective target 10, and the light emitted by the light source unit 20 is reflected by the target 10 and then collected by the camera module.
The target 10 is a transmissive target 10, and the light emitted from the light source unit 20 is collected by the camera module after passing through the target 10.
Fig. 3A to 3C are schematic views of images of the camera module after collecting the light from the target 10.
Fig. 3A is an imaging schematic diagram of the main camera module a, fig. 3B is an imaging schematic diagram of the wide-angle camera module B, and fig. 3C is an imaging schematic diagram of the telephoto camera module C.
Based on the field angle difference between the three modules of making a video recording, the formation of image definition of long focus module C is higher than the formation of image definition of main module A of making a video recording, the formation of image definition of main module A of making a video recording is higher than the formation of image definition of wide angle module B of making a video recording.
Further, the three types of images obtained by imaging are preprocessed so as to improve the stability of the related algorithms tested by different camera modules at the same time.
Specifically, according to different imaging characteristics of the three camera modules, different image segmentation methods need to be adopted for the three camera modules.
Fig. 4A to 4C and fig. 5 show an embodiment of a resolving power testing method according to the present invention. Specifically, fig. 4A, 4B and 4C respectively show the processing procedure of the image obtained by imaging with respect to the main camera module a, the processing procedure of the image obtained by imaging with respect to the wide camera module B, and the processing procedure of the image obtained by imaging with respect to the tele camera module C.
When the image obtained by imaging of the main camera module A is preprocessed, in order to improve the running efficiency and the positioning accuracy of a related algorithm, the image obtained by imaging of the main camera module A is firstly reduced appropriately, then the small white blocks are divided by a self-adaptive threshold value to be used as Mark points for positioning, and the small black blocks in a binary image are filled with white, so that the image obtained by imaging of the main camera module A is processed to only have large white blocks and large black blocks filled with the small white blocks, wherein the large white blocks and the large black blocks are mutually staggered in an inclined transverse direction or an inclined longitudinal direction.
And then searching edge position points in four directions of up, down, left and right by taking the center of the small white block as a Mark point as a starting point, and selecting a corresponding test area according to actual requirements.
When the image obtained by the wide-angle camera module B is preprocessed, in order to improve the running efficiency and the positioning accuracy of a related algorithm, the image obtained by the wide-angle camera module B is firstly reduced appropriately, then the small white blocks are segmented by a self-adaptive threshold value to be used as Mark points for positioning, the small black blocks filled in the binary image are white, and the small white blocks filled in the binary image are black, so that the image obtained by the wide-angle camera module B is processed to only have large white blocks and large black blocks, wherein the large white blocks and the large black blocks are mutually staggered in an inclined transverse direction or an inclined longitudinal method.
And then searching edge position points in four directions of the upper direction, the lower direction, the left direction and the right direction by taking the original small white block which is used as the Mark point and is filled with black as a starting point, and then selecting a corresponding test area according to actual requirements.
When the image obtained by imaging of the telephoto camera module C is preprocessed, in order to provide the operation efficiency of the correlation algorithm and the positioning accuracy, the image obtained by imaging of the telephoto camera module C is also appropriately reduced, then the small white blocks and the small black blocks are segmented by the adaptive threshold value to be used as Mark points for positioning, each small white block and each small black block are used as Mark points for positioning, and edge position points of two layers are searched in the vertical and horizontal directions by taking the center of each small white block and each small black block as the Mark point as a starting point. Specifically, for example, the small white block is searched for an edge position point of the small white block in the up-down left-right direction and an edge position point of the large black block where the small white block is located in the up-down left-right direction, and for example, the small black block is searched for an edge position point of the small black block in the up-down left-right direction and an edge position point of the large white block where the small black block is located in the up-down left-right direction.
And then selecting a corresponding test area according to actual requirements.
It can be understood that the main camera module A, the wide-angle camera module B and in the tele camera module C, the area of the color block in the image obtained by the tele camera module C is larger than the area of the corresponding color block in the image obtained by the main camera module A or the wide-angle camera module B. To address this problem, an embodiment of the present invention provides a method for automatically finding the nearest edge to reduce the field of view bias.
The method for automatically searching the nearest adjacent edge firstly searches the nearest Mark point through a given point and then judges the position of the given point.
If the given point falls in the large white block area and the small black block area, edge position points of four sides of the large white block and four sides of the small black block are searched in four directions of up, down, left and right through an image recognition technology, and then a test area with relatively small view field deviation is selected through the distance from the edge position points to the given point and the view field deviation to serve as a mode for evaluating the image definition of the telephoto camera module C in the horizontal and vertical direction of the view field.
If the given point falls in the large black block area and the small white block area, edge position points of four edges of the large black block area and four edges of the small white block area are searched in four directions of up, down, left and right through an image recognition technology, and then a test area with relatively small view field deviation is selected through the distance from the edge position points to the given point and the view field deviation to serve as a mode for evaluating the image definition of the long-focus camera module C in the horizontal and vertical view field methods. For the main camera module A, the area of a color block in an image obtained by imaging of the main camera module A is small, the field deviation is small, edge position points are searched in four directions of an upper direction, a lower direction, a left direction and a right direction by taking the center of the small white block as a Mark point as a starting point through the given point, and then a corresponding test area is selected according to actual requirements. It will be appreciated that at this point the original tile locations have been filled with black.
For the wide-angle camera module B, the area of a color block in an image obtained by the wide-angle camera module B is small, the field deviation is small, edge position points are searched in four directions of the upper direction, the lower direction, the left direction and the right direction by taking the center of the small white block as a Mark point as a starting point through the given point, and then a corresponding test area is selected according to actual requirements. It can be understood that, at this time, the original small white block position has been filled with black, and the original small black block position has been filled with white, so as to facilitate subsequent positioning and meet the stability of mass production.
By automatically searching the horizontal edge and the vertical edge with the minimum deviation from the given point view field, the view field precision of automatically positioning each test area by three cameras is improved.
Further, the invention provides a method for testing the resolving power, which comprises the following steps:
a. importing at least three images, wherein the images are respectively from a main camera module A, a wide-angle camera module B and a long-focus camera module C;
b. reducing the size of the image and extracting a Y component;
c. based on the type of the image from a camera module, adopting a corresponding processing mode to automatically find the nearest test area;
d. determining a horizontal side and a vertical side according to the principle of small field deviation, and extracting an SFR test area according to the size of the ROI;
e. calculating to obtain an EFS curve and obtaining an LSF curve according to the EFS curve; and
f. and processing the LSF curve to obtain SFR.
According to some embodiments of the invention, in the step (c), further comprising the steps of:
filling small black blocks into the image from a main camera module A to be white; and
and automatically searching the nearest test area according to the given coordinate point and the small white block serving as the Mark point. According to some embodiments of the invention, wherein in the above method, the binary map is adaptively split before filling the small black blocks.
According to some embodiments of the present invention, in the above method, the edge position is found by taking the center of the Mark point as a starting point, and taking the Mark point as an upper, lower, left and right sides.
According to some embodiments of the invention, in the step (c), further comprising the steps of:
filling small black blocks into the image from a wide-angle camera module B, wherein the small black blocks are white and the small white blocks are black; and
and automatically searching the nearest test area according to the given coordinate point and the small white block serving as the Mark point.
According to some embodiments of the invention, wherein in the above method the binary map is adaptively split before filling the small white blocks.
According to some embodiments of the present invention, in the method, the edge position is found in the up, down, left and right directions with the Mark point center as a starting point.
According to some embodiments of the invention, in the step (c), further comprising the steps of:
and automatically searching the nearest test area according to the coordinate point of the given point and the small white block and the small black block serving as the Mark point when the image comes from a long-focus camera module C.
According to some embodiments of the invention, wherein in the above method, the binary map is adaptively split before filling the small black blocks to white and the small white blocks to black.
According to some embodiments of the present invention, in the above method, the edge position is found by an up-down-left-right method using the center of the Mark point as a starting point, and then the test area with relatively small field deviation is selected by the distance from the edge position point to the given point and the field deviation.
According to some embodiments of the invention, wherein in the above method, further comprising the step of:
calculating the distance from the given point to the Mark point;
if the distance is larger than half of the diagonal of the small black block, searching the edge position of the small black block or the edge position of the small white block in the vertical and horizontal directions by taking the center of the Mark point as a starting point; and
and if the distance is not more than half of the diagonal of the small black block, searching the edge position of the small black block or the edge position of the small white block in the up, down, left and right directions by taking the center of the Mark point as a starting point.
In the step (a), the image is obtained by the main camera module a, the wide camera module B, and the telephoto camera module C. For example, the main camera module a, the wide camera module B and the tele camera module C are installed on the base station of an SFR testing apparatus 1, and then the initial image is captured for the target 10 of the SFR testing apparatus 1 and then transmitted to the image capturing unit 40.
In a preferred embodiment of the present invention, the image recognition technique is utilized to automatically and rapidly locate each of the SFR test zones. Firstly, when the central position of each Mark point is positioned, in order to improve the operation efficiency of the algorithm, the image is appropriately reduced, and then a threshold segmentation process is carried out. When the difference between the brightness of the center and the brightness of the edge of the image of the camera module is obvious, a local segmentation scheme can be adopted, that is, the image is processed in a blocking manner, for example, the image is divided into 3 times 3 blocks, each block is segmented and binarized, and then the position of each Mark point is finally positioned by utilizing the image recognition technology. And searching edge position points in four directions of left, right, upper and lower directions by taking the Mark point as a starting point, and then selecting a corresponding SFR test area according to actual requirements.
For the main camera module A and the wide-angle camera module B, the Mark point is the small white block.
For the tele camera module C, the Mark point is the small black block.
According to an embodiment of the present invention, for the calculation of the ESF curve, a projection method may be adopted, then the ESF curve is smoothed in five-point segmentation, then the ESF curve is subjected to differentiation processing to obtain the LSF curve, and for the windowing and smoothing processing of the LSF curve, the LSF curve is subjected to fourier transform and normalization to obtain the SFR.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (20)
1. A resolution testing method for three-shot photography is characterized by comprising the following steps:
(A) the main camera module, the wide-angle camera module and the long-focus camera module shoot the same target;
(B) acquiring three images, wherein one of the images corresponds to the main camera module, one of the images corresponds to the wide-angle camera module, and the other image corresponds to the telephoto camera module, wherein each of the images at least comprises a first color block, a second color block, a third color block and a fourth color block, wherein the first color block and the second color block are alternately arranged in a transverse direction and a longitudinal direction respectively, the third color block is located in the first color block, and the fourth color block is located in the second color block;
(C) processing the image based on the type of the camera module of the image source and obtaining a test area;
(D) processing the test area to obtain an EFS curve and obtaining an LSF curve according to the EFS curve; and
(E) processing the LSF curve to obtain an SFR value.
2. The resolving power testing method as claimed in claim 1, wherein the step (C) further comprises the steps of:
reducing the size of the image and extracting a Y component; and
processing the image based on the type of camera module from which the image originated to automatically find the nearest test area.
3. The resolving power testing method according to claim 1 or 2, wherein in the above method, further comprising the steps of:
adaptively dividing a binary image, wherein the image is from the main camera module, and the third color block filled in the first color block is consistent with the first color block; and
and automatically searching the nearest test color block according to a given coordinate point and the third color block serving as a Mark point.
4. The method for testing resolution according to claim 3, wherein in the method, the edge position is found in four directions, up, down, left, and right, starting from the center of the Mark point.
5. The resolving power testing method according to claim 1 or 2, wherein in the above method, further comprising the steps of:
adaptively dividing a binary image, and when the image is from the wide-angle camera module, filling the third color patch of the first color patch to coincide with the first color patch and filling the fourth color patch of the second color patch to coincide with the second color patch; and
and automatically searching the nearest test color block according to a given coordinate point and the first small color block serving as a Mark point.
6. The method for testing resolution according to claim 5, wherein in the method, the edge position is found in four directions, up, down, left, and right, with the center of the Mark point as a starting point.
7. The resolving power testing method according to claim 1 or 2, wherein in the above method, further comprising the steps of:
adaptively segmenting a binary image; and
and when the image comes from the tele camera module, automatically searching the nearest test color block according to the fourth color block and the third color block which are respectively used as a Mark point and a given coordinate.
8. The resolving power testing method according to claim 7, wherein in the above method, the edge position of the third color block or the edge position of the first small color block is found in four directions of up, down, left, and right with the center of the Mark point as a starting point at a given distance from the Mark point greater than half of the diagonal angle of the third color block.
9. The resolving power testing method according to claim 7, wherein in the above method, at a given distance from the Mark point to the coordinate is less than or equal to half of an oblique angle of the third color block, the edge position of the first color block where the third color block and the third color block are located or the edge position of the second color block where the fourth color block and the fourth color block are located is found in four directions, up, down, left, and right, with the center of the Mark point as a starting point.
10. The resolving power testing method according to any one of claims 1 to 9, wherein the first color patch and the fourth color patch are both white, and the second color patch and the third color patch are both black.
11. The resolving power testing method according to any one of claims 1 to 9, wherein the target includes a plurality of first regions, a plurality of second regions, a plurality of third regions, and a plurality of fourth regions, wherein the first regions and the second regions are alternately arranged in both a lateral direction and a longitudinal direction, the third regions are located in the first regions, and the fourth regions are located in the second regions, wherein the first regions correspond to the first patches, the second regions correspond to the second patches, the third regions correspond to the third patches, and the fourth regions correspond to the fourth patches.
12. The resolving power testing method according to claim 11, wherein the first area and the third area are both white, and the second area and the fourth area are both black.
13. The resolving power testing method according to claim 12, wherein the first region and the third region, the second region and the fourth region share no more than 0.1 field of view therebetween.
14. A resolving power testing apparatus, characterized in that the resolving power testing method according to any one of claims 1 to 13 is applied.
15. The target is applied to a resolving power test and is characterized by comprising a plurality of first areas, a plurality of second areas, a plurality of third areas and a plurality of fourth areas, wherein the first areas and the second areas are alternately arranged in a transverse direction and a longitudinal direction, the third areas are located in the first areas, and the fourth areas are located in the second areas.
16. The target of claim 15, wherein the first and third regions, the second and fourth regions share no more than 0.1 fields of view therebetween.
17. The target of claim 15 or 16, wherein the first and second regions are the same shape and size.
18. The target of claim 15 or 16, wherein the third and fourth regions are the same shape and size.
19. The target of claim 17, wherein the first and third areas are both white and the second and fourth areas are both black.
20. An image resolution testing apparatus, comprising:
a target according to any one of claims 15 to 19;
a light source unit;
the system comprises a base station, a camera module and a camera module, wherein the base station is used for supporting a main camera module, a wide-angle camera module and a long-focus camera module; and
an image acquisition unit, wherein the image acquisition unit is connected in by communicatable in the main module of making a video recording, the wide angle module of making a video recording and the long focus module of making a video recording, the light source unit radiation light extremely the target, the main module of making a video recording, the wide angle module of making a video recording and the long focus module of making a video recording obtain about the corresponding image of target for follow-up SFR numerical value of calculation.
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